When most of us think about how we came to our political views, we often give a straightforward answer. We believe our stances on taxes, immigration or national security are shaped by those around us — our friends, parents, teachers. We assume our life experiences are the root of our political ideologies. But what if there is something deeper in us that drives the music we listen to, the food we eat — even the politicians that we elect? This week, we explore the role of biology in shaping our political identities.